Reading attribute from remote user flow

[Cantor, Scott]

You found the answer; that sort of feature usually requires using the External flow and not the RemoteUser flow.

Literally from the docs:

"If you need something different from this, your best option is to use the External login flow and possibly adapt the existing servlet as an example to copy from for your own purposes. In all respects, this flow is simply a more concrete use of the External flow."

-- Scott